HIIT & USRPT comparisons

I would like some comparisons between HIIT and USRPT. Differences and similarities. How would a beginner (with good technique and previous training, and moderate amount of conditioning) begin? Thank you
Parents
  • What really works for me is having a good coach, picking things up, putting them down, and practicing the actual races. Agreed.
Reply
  • What really works for me is having a good coach, picking things up, putting them down, and practicing the actual races. Agreed.
Children
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